Back support



FIG. 1 is a perspective view of a back support according to an embodiment;

FIG. 2 is a right side view of the back support of FIG. 1;

FIG. 3 is a left side view of the back support of FIG. 1;

FIG. 4 is a front view of the back support of FIG. 1;

FIG. 5 is a rear view of the back support of FIG. 1;

FIG. 6 is a top view of the back support of FIG. 1;

FIG. 7 is a bottom view of the back support of FIG. 1;

FIG. 8 is a perspective view of a back support according to another embodiment;

FIG. 9 is a right side view of the back support of FIG. 8;

FIG. 10 is a left side view of the back support of FIG. 8;

FIG. 11 is a front view of the back support of FIG. 8;

FIG. 12 is a rear view of the back support of FIG. 8;

FIG. 13 is a top view of the back support of FIG. 8; and,

FIG. 14 is a bottom view of the back support of FIG. 8.

The broken lines show portions of the article not claimed and form no part of the claimed design. 

CLAIM The ornamental design for a back support, as shown and described. 